#region Copyright(c) Anton Shelin, Vladimir Timashkov. All Rights Reserved.
// -----------------------------------------------------------------------------
// Copyright(c) 2010 Anton Shelin, Vladimir Timashkov. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
//   1. No Trademark License - Microsoft Public License (Ms-PL) does not grant you rights to use
//      authors names, logos, or trademarks.
//   2. If you distribute any portion of the software, you must retain all copyright,
//      patent, trademark, and attribution notices that are present in the software.
//   3. If you distribute any portion of the software in source code form, you may do
//      so only under this license by including a complete copy of Microsoft Public License (Ms-PL)
//      with your distribution. If you distribute any portion of the software in compiled
//      or object code form, you may only do so under a license that complies with
//      Microsoft Public License (Ms-PL).
//   4. The names of the authors may not be used to endorse or promote products
//      derived from this software without specific prior written permission.
//
// The software is licensed "as-is." You bear the risk of using it. The authors
// give no express warranties, guarantees or conditions. You may have additional consumer
// rights under your local laws which this license cannot change. To the extent permitted
// under your local laws, the authors exclude the implied warranties of merchantability,
// fitness for a particular purpose and non-infringement.
// -----------------------------------------------------------------------------
#endregion

using System;

namespace SharpDom
{
    /// <summary>Class used for building HTML content</summary>
    /// <remarks>It includes all tags and all atributes.</remarks>
    public abstract partial class UserControlBuilder<TViewModel>
    {
        /// <summary>Method return container tag with assigned visibility dependant on the condition</summary>
        /// <param name="condition">Boolean condition on which to decide whether to show nested tags or not</param>
        /// <param name="Then">On TRUE condition, lambda returning the same container supplied as input parameter</param>
        /// <returns>Container tag</returns>
        public virtual ContainerTag If(bool condition, Func<ContainerTag, ContainerTag> Then)
        {
            return If(condition, Then, null);
        }

        /// <summary>Method return container tag with assigned visibility dependant on the condition</summary>
        /// <param name="condition">Boolean condition on which to decide whether to show nested tags or not</param>
        /// <param name="Then">On TRUE condition, lambda returning the same container supplied as input parameter</param>
        /// <param name="Else">On ELSE condition, lambda returning the same container supplied as input parameter</param>
        /// <returns>Container tag</returns>
        public virtual ContainerTag If(bool condition, Func<ContainerTag, ContainerTag> Then, Func<ContainerTag, ContainerTag> Else)
        {
            var container = new OperatorTag<TViewModel>(default(TViewModel));
            if (condition && Then != null)
            {
                Then(container);
            }
            if (!condition && Else != null)
            {
                Else(container);
            }
            return container;
        }

        /// <summary>Method return container tag with assigned visibility dependant on the condition</summary>
        /// <param name="condition">Boolean condition on which to decide whether to show nested tags or not</param>
        /// <param name="Then">On TRUE condition, lambda returning tag</param>
        /// <returns>Container tag</returns>
        public virtual ContainerTag If(bool condition, Func<TreeLeafTag> Then)
        {
            return If(condition, Then, null);
        }

        /// <summary>Method return container tag with assigned visibility dependant on the condition</summary>
        /// <param name="condition">Boolean condition on which to decide whether to show nested tags or not</param>
        /// <param name="Then">On TRUE condition, lambda returning tag</param>
        /// <param name="Else">On ELSE condition, lambda returning tag</param>
        /// <returns>Container tag</returns>
        public virtual ContainerTag If(bool condition, Func<TreeLeafTag> Then, Func<TreeLeafTag> Else)
        {
            var container = new OperatorTag<TViewModel>(default(TViewModel));
            if (condition && Then != null)
            {
                var item = Then();
                container.Children.Add(item);
            }
            if (!condition && Else != null)
            {
                var item = Else();
                container.Children.Add(item);
            }
            return container;
        }
    }
}